Die.



W. SCRIMGEOUR.

DIE.

APPLICATION FILED FEB- 12, 1915.

Patented Apr. 4, 1916.

2 SHEETS-SHEET l.

'l l'm aiio W. SCRIMGEOUR.

DIE.

WPUCATION FILED FEB. 12. 1915.

Patented APR 4%, 35%.

2 SHEETS*SHEE1 %MWW\ M4 32 @Q QM/kw MW 7 W 4 WILLIAM SCRIMGEOUR, OF PORTSMOUTH, VIRGINIA.

DIE.

Specification of Letters Patent.

Patented Apr. 4, 1916.

Application filed February 12, 1915. Serial No. 7,817.

T 0 all whom it may concern:

Be it known that I, WILLIAM ScRrM- GEOUR, a citizen of the United States, residing at Portsmouth,.in the county of Norfolk and State of Virginia, have invented certain new and useful Improvements in Dies, of which the following is a specification. I My invention relates to a combined piercing and drawing die-press for making hollow receptacles of metal, such as hollow projectiles, shrapnel casings, and casings capable of general use.

It has for its object to provide a press in which such articles can be made rapidly and by a minimum number of operations, thereby .saving time andexpense, since a finished article, even when made of large size and out of heavy stock, may be completed at one heat.

Referring to the drawings, Figure 1 is an elevation of the press, with parts in section; Fig. 2 is a plan, showing parts beneath plane 2-2 of Fig. 1; Fig. 3 is an cle.

elevation like Fig. 1, but showing the parts in another position; Fig. 4 is a plan showing the shifting tool-carrier, looking down toward plane 4-4 of Fig. 3; Figs. 5 and 6 show the various steps in the formation of projectiles of different shape; and Fig. 7 is a sectional elevation showing a power-press in which the lower plunger is operated by a toggle.

, Referring to the drawings 14 is the crosshead of a high-speed hydraulic or steamhydraulic press, on which is mounted a rotating or oscillating tool-carrier 13, shown,

in this instance, as sector shaped and carrying two operating tools 11 and 12. It may, however, be constructed to carry a larger number of tools and in such case is made of a larger part or the whole of a cir- This tool-carrier 13 is journaled on a heavy bolt 19' secured to the cross-head 14, and is guided in its to-and-fro movement by a headed bolt 18, also secured in the crosshead, this bolt being located in a slot 20 in the tool-carrier 13. The carrier 13 is oscillated by any suitable means, such as a hydraulic motor 30, which operates a rack 31, engaging teeth 32 on the butt of the carrier.

A is a massive die, seated in a die-holder D, this die having an opening flaring at the top, but cylindrical at its lower portion.

B, B are legs on which the die-holder is mounted.

C is the plunger of a hydraulic ram having a cap-piece with a nose 17 entering the cylindrical portion of the die-opening, and shaped to give the end of the article its proper form.'

E is the cylinder of the lower rain, having a supply pipe E- of relatively large diameter, so that pressure fluid may be ad mitted and exhausted rapidly.

E is a fluid supply pipe entering the cylinder above the piston to assist in rapidly lowering the piston. At each side of the die-holder are water-cooling tanks P, P. Mounted on the upper face of the die-holder D are spring-pressed guide plates 16, 16,

.having codperating semi-circular openings therein (Fig. 2), these plates being free to move longitudinally against the spring pressure, but held against upward movement by keepers F', F, bolted to the die. Integrally formed cylindrical tangs 16, 16,-extend to the rear of the guide-plates into spring boxes 15, 15, cast integrally with the dieholder D. These guide plates serve to maintain the blank in upright position when it is introduced into the die cavity, and also act as stripper plates.

Fig. 5 shows the successive forms assumed by the article being made, G representing the ingot or blank, G the pierced ingot or blank, and G the finished cylindrical article, such as a shrapnel casing. In Fig. 6,

-H, H H represent similar phases of a pointed projectile, the nose 17 being given a shape to give the blank a pointed end, instead of a fiat end, as in Figs. 1 and 5.

The operation of the press is as follows: The heated blank G or H is dropped into the die cavity and the cross-head 14 is then moved down forcing the piercing tool 11 into the mass of metal, thereby forming it into shape G or H During the operation the plunger 0 is held up by sufiicient pressure to prevent its lowering, so that the lower end of the article is formed between the ends of tool 11 and nose 17, the sides being formed between the sides of the tool 11 and the walls of the die cavity. The plunger C is then dropped, the cross-head 14 raised until tool 12 is raised clear of the diecarrier, and the tool-carrier moved to bring tool 12' over the die cavity, whereupon the cross-head 14 is again lowered, forcing the tool 12 down into the partially formed article (which has been stripped from tool 11 by plates 16, 16), thereby forcing it downwardly through the cylindrical opening at -the lower nd of the die cavity, thus forming an article of shape G or H. The finished article is forced clear through the die, and drops out, or stripped from the tool 12 by the lower edges of the die-opening as the tool moves upward. \Vhen the crosshead 14 has moved up high enough for tool 12 to clear the die-holder, the carrier 13 is moved back to bring tool 11 into position for a new cycleoi operation.

The action of the machine is positive and rapid. so that a finished and still hot article is produced, at one heat and by two simple operations. \Vhile only two tools have been shown, more may be used, if desired.

()ther forms of press than that shown may of course he used. Thus in Fig. 7, I have shown one form of power press suitable for the intended purpose in which the nose 1? is carried on a plunger 50 operated by a pair of toggle levers 51, 52, the bar 53 connected to the knuckle of the toggle being in turn connected to any suitable power mechanism. The operation of this form of press will be readily understood in connection with the foregoing description.

1. The combination with a die having a tapering; top and cylindrical bottom opening therethrough, of a plunger having an endshaping nose adapted to extend into said cylindrical opening, a cross-head, carrying a plurality of tools including one cooperating with the walls of said tapering opening and another for forcing the metal through the cylindrical opening, means for operating said plunger and cross-head, and means for alternately shitting each of the tools upon the cross-head from an operative to an inoperative position relatively to the dieopening.

The combination with a die having a tapering top and cylindrical bottom opening theretln'ough. of a plunger having an endshaping nose adapted t extend into said cylindrical opening, a cross-head, a. pivoted tool carrier secured to said crosshead and means for niovintr it. a plurality of tools mounted on said carrier and including one cooperating with the walls of said tar pering opening and another for forcing the metal through the cylindrical opening, and means for operating said plunger and crosshead.

In testimony whereof I atfiX my signature in presence of two witnesses.

\VILLIAM SCRIMGEOUR.

\Vitnesses:

J. H. BRICKENSTEIN, J os. H. BLACKWOOD. 

